HR 244

HR 244
Observation data
Epoch J2000      Equinox J2000
Constellation Cassiopeia
Right ascension 00h 53m 04.19644s[1]
Declination +61° 07′ 26.2993″[1]
Apparent magnitude (V) 4.80[2]
Characteristics
Evolutionary stage subgiant[1]
Spectral type F9V[3]
B−V color index 0.540±0.008[4]
Astrometry
Radial velocity (Rv)+20.68±0.12[1] km/s
Proper motion (μ) RA: –68.298[1] mas/yr
Dec.: +169.435[1] mas/yr
Parallax (π)52.9017 ± 0.1037 mas[1]
Distance61.7 ± 0.1 ly
(18.90 ± 0.04 pc)
Absolute magnitude (MV)3.44[4]
Details
Mass1.194[5] M☉
Radius1.77[1] R☉
Luminosity3.7[1] L☉
Surface gravity (log g)0.53[2] cgs
Temperature5,986[1] K
Metallicity [Fe/H]0.04[5] dex
Rotational velocity (v sin i)8.1[2] km/s
Age5.3[5] Gyr
Other designations
BD+60°124, GJ 41, HD 5015, HIP 4151, HR 244, SAO 11444, WDS J00531+6107A[6]
Database references
SIMBADdata

HR 244 is a single[7] star in the constellation Cassiopeia. It has a yellow-white hue and is visible to the naked eye with an apparent visual magnitude of 4.80.[2] Based upon parallax measurements, it is located at a distance of 62 light years from the Sun, and is drifting further away with a radial velocity of +20.7 km/s;[1] around 546,000 years ago it passed within 38 light-years of the Sun.[4] The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.183 arcseconds per annum.[8]

This object is an F-type star with a stellar classification of F9V.[3] Despite the spectral class, evolutionary models show it to have left the main sequence and is now a subgiant.[1] It is 5.3[5] billion years old and is spinning with a projected rotational velocity of 8 km/s.[2] The star has 1.2[5] times the mass of the Sun and 1.8[1] times the Sun's radius. It is radiating 3.7 times the luminosity of the Sun from its photosphere at an effective temperature of 5,986 K.[1]

  1. ^ a b c d e f g h i j k l m n Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Earle2017 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Abt2009 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference Boyajian2013 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Lepine2005 was invoked but never defined (see the help page).